vitest

Run TypeScript unit, component, and snapshot tests with Vitest.

68|19|Updated Nov 21, 2025
One-click install
npx skills add https://github.com/bobmatnyc/claude-mpm-skills --skill vitest-bobmatnyc
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/bobmatnyc/claude-mpm-skills/tree/main/toolchains/typescript/testing/vitest
Command: npx skills add https://github.com/bobmatnyc/claude-mpm-skills --skill vitest-bobmatnyc

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill provides a fast, efficient, and modern testing framework for TypeScript and JavaScript projects, enabling developers to write and run tests quickly and reliably.

Core Features & Use Cases

  • Vite-native Test Execution: Experience blazing-fast test runs with instant HMR.
  • TypeScript-First Design: Built-in support for TypeScript without extra configuration.
  • Component Testing: Seamless integration with React Testing Library and Vue Test Utils.
  • Migration Friendly: Compatible API for easy transition from Jest.
  • Use Case: Quickly set up a testing suite for your new Vite-powered React application, write component tests, and ensure type safety with Vitest's built-in TypeScript support.

Quick Start

Install Vitest and create your first test file in your TypeScript project.

Frequently Asked Questions about vitest

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up TypeScript testing in a Vite project?

Vitest provides Vite-native test execution with built-in TypeScript support, enabling fast test runs with instant HMR and ESM support without requiring extra configuration for your TypeScript project.

Can I migrate my existing Jest tests to Vitest?

Vitest offers a compatible API designed for easy transition from Jest, allowing you to migrate existing JavaScript and TypeScript tests smoothly while gaining Vite-native execution speed.

Does Vitest work with React and Vue component testing?

Vitest supports component testing for React and Vue applications through seamless integration with React Testing Library and Vue Test Utils, enabling you to write component tests with built-in TypeScript type safety.

What is the best way to get v8 coverage reporting for TypeScript tests?

Vitest includes built-in v8 coverage reporting, providing fast execution and ESM support while generating coverage reports for your React or Vue application tests.

Why use a Vite-native test runner instead of other JavaScript testing frameworks?

Vitest offers blazing-fast execution and instant HMR for TypeScript projects, providing a modern testing framework with ESM support and built-in TypeScript integration that reduces configuration overhead compared to other JavaScript testing frameworks.

Do I need extra configuration to write snapshot tests in TypeScript?

Vitest provides built-in TypeScript integration and supports snapshot testing without extra configuration, allowing you to write snapshot tests for React and Vue applications directly within your Vite-powered project.